Sylvester sawyer



NITED STATES PATENT OFFICE.

SYLVESTER SAWYER, OF FITCHBURG, MASSACHUSETTS, ASSIGNOR TO AMERICAN HOOP MACHINE COMPANY.

MACHINE FOR PLANING- HOOPS.

Speccaton of Letters Patent No. 16,513, dated January 27, 1857.

To all whom 'it may concern:

Be it known that I, SYLvEs'rnR SAwYER, of Fitchburg, in the county of Vorcester and State of Massachusetts, have invented ce1'- tain new and useful Improvements in Hachines for Shaving Hoops, of which the following is a full, clear, and exact description, reference being had to the annexed' drawings, making part of this specification, in which Figure l, is a plan. Fig. 2, an elevation.

Fig. 3, a horizontal section upon the line A, A, of Fig. 2. Fig. il, details of the cutters and rest.

My present invention consists in certain improvements upon a machine for which Letters Patent were granted to myself in connection with Joseph Sawyer for improved hoop machine on the sixth day of May 1856.

To enable others skilled in the art to understand my invention, I will proceed to describe the manner in which I have carried it out.

The machine is set in motion by power applied to the pulley A, upon the driving shaft B. To the Hy wheel C, upon this shaft is attached a crank pin a, (seen dotted in Fig. 2) from which by the pitman D, a vertically reciprocating motion is communicated to the gate E which slides upon the standard Gr, and is guided by suitable straps f. The bar E, carries the cutters and c, the former being set rank to reduce the hoop to a uniform thickness, the latter which is the longest finishing the surface. They are also so arranged that the cutter o, shall operate upon the down stroke, and the cutter c, upon the up stroke. Immediately behind the cutter is the rest H, against which the iinished surface of the hoop rests, the roll I, serving to hold it up to the rest and cutters as will be'liereafter explained.

The hoop enters the machine between the rolls K, and L, heretofore one of these rolls has been stationary the other being hung with springs and allowed to yield suflicient to permit the passage of a knot. By thus throwing all the motion into one of the rolls, the hoop was liable to be bent out of its general line of motion, and to be shaved unevenly.

K is the movable roll which is forced up to its work by the spring M, the strength of this spring is adjusted by the screw g. The roll L, is hung in the frame N which is pivoted upon the shaft X and has attached to it a lever O, the position of which is regulated by the screw n, to accommodate the position of the roll to the general size of the hoops to be shaved. To allow for the yielding of the roll L upon the passage of a knot, a slight play is allowed to the lever O, between the set screws m, and n, and it is held against the latter by a spring P, which is of a strength that will allow it to yield after the spring M, is slightly compressed. For the slight inequalities of the hoop the roll K, will yield, but upon the arrival of a knot opposite to the roll L, the spring P yields to. permit its passage, and thus the hoop is prevented from being thrown so far to one side as would otherwise be the case were the roll L, rigid and immovable. This device is necessary only when knotty stuff is operated upon, where the hoops are clear of knots, or when the knots are trimmed close, the lever O, and roll L,

may be held stationary by the set screws m and n.

The roll I, is hung in the frame P', and is kept up to its work by the spring Q. The motion of the frame P, in one direction is limited by the eccentric R, the position of which is regulated by the lever S, and graduated arc T, by means of which the distance of the roll I from the cut-ters is adjusted for any desired thickness of hoop, and the operator is enabled gradually to bring up this roll as the end of the hoop passes through to form the lap.

The worm V, gives motion to the gear W, upon the shaft X, and a gear Z upon this shaft engages with asimilar gear Y, upon the shaft V, of the roll L, by which means this roll is driven.

Vhat I claim as my invention and desire to secure by Letters Patent, is

l. Giving the frame N, which carries the roll L, a play between the adjusting screws m, and n, and bringing the roll up to its work by the spring P, in the manner and for the purpose set forth.

2. I claim the eccentric R, lever S, gradtion with the rest H operating in the manner substantially as set forth.

SYLVESTER SA'WYER.

Vtnesses:

SAM. COOPER, P. E. TESCHEMACHER. 

